Static Local Function in C# 8.0

// Simple C# program to illustrate 
// the static local function
using System;

class Geeks
{
	public static void calc()
	{
		int val = 10;
      
		// local function 
		// can access val
		void local_greet()
		{
			Console.WriteLine("Hello from local function" 
                              + val);
		}

		// Static local function 
		// cannot access val
		static void static_greet()
		{
			Console.WriteLine("Hello from static local function" 
                              + val);
		}
		
		// Calling local functions
		local_greet();
      
        // calling static function 
		static_greet();
	}

	public static void Main(String[] args)
	{
		calc();
	}
}

// C# program to demonstrate regular and static local functions
using System; 

class Geeks
{
    // Method to demonstrate local and static local functions
    public static void calc()
    {
        int val = 10; // Local variable

        // Regular local function 
        // Can access 'val' directly from the enclosing method
        void local_greet()
        {
            Console.WriteLine("local function has val: " + val);
        }

        // Static local function 
        // Requires a parameter to access external variables
        static void static_greet(int v)
        {
            Console.WriteLine("static local function has val: " + v);
        }
        
        // Calling static function with the parameter 'val'
        static_greet(val);

        // Calling the regular local function that accesses 'val' directly
        local_greet();
    }

    // Main method to execute the calc function
    public static void Main(String[] args)
    {
        calc();
    }
}

// Simple C# program to
// illustrate local function
using System;

class Geeks
{
	public static void Main()
	{
		// Here SubValue is the local
		// function of the main function
		void SubValue(int a, int b)
		{
			Console.WriteLine("Value of a is: " + a);
			Console.WriteLine("Value of b is: " + b);
			Console.WriteLine("final result: {0}", a - b);
			Console.WriteLine();
		}

		// Calling Local function
		SubValue(30, 10);
		SubValue(80, 60);
	}
}